Format
JH
Jonkman, Harmen
GM🇳🇱FIDE 1002708· Male· Netherlands· Born in 1975
Follow Harmen JonkmanTrack his monthly FIDE ratings, games, tournaments and more.
Harmen Jonkman, a 51-year-old Dutch Grandmaster, is rated 2287 and sitting in the top 3% of Dutch players, and in the top 2% worldwide. He is currently in the 2250–2300 range. 22 rated games in the past year (≈37/year long-term). Recent standard appearances include 23rd Bangkok Chess Club Open 2026, NRW-Klasse Gruppe 2 2025-2026 Maerz 2026, and Dutch Team Competition - klasse 1 Round 4. He had 2 career breaks: 23 months (2009–2011) and 25 months (2013–2015). His peak of 2520 was reached at age 27 (Apr 2002, World #406 at the time).
Awarded GM in 2002 (age 27) and IM in 2001 (age 26).
Current rating
2287
Standard
Rpd2351·Blz2368
All-time high
2520
−233 pts below
Apr 2002 · age 27
Apr 2002 · age 27
Activity
21
games / yr avg. · ≈2/mo
22 past 12 mo · ≈2/mo
classical only
Moderately active
classical only
Moderately active
Signature stat
Top 3%
#145 · Dutch players · of 4,671
Career timeline
21 entries2026
11th Dutch 50-55 player
at age 51 · rated 2310
Apr 2026
2022
8th Dutch 45-50 player
at age 47 · rated 2386
Apr 2022
2018
Re-crossed 2400
at age 43
Jan 2018
2017
Re-crossed 2400
at age 42
Apr 2017
2016
5th Dutch 40-45 player
at age 41 · rated 2430
Jan 2016
2013
Inactive for 25 months
paused at 2425 → returned at 2429
Jun 2013
Standard rating history
Activity & highlights
Evolution
-13
2300 → 2287
Tournaments
11
20 games
Score
13/ 2065.0%
9W8D3L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
11 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Apr 2026 | 5/9 | #75 | 2065 | -22.5 |
Team | Mar 2026 | 1/1 | #3 | 3021 | +3.8 |
Team | Feb 2026 | 0.5/1 | #57 | 2235 | -1.0 |
Team | Dec 2025 | 1/1 | #12 | 2919 | +2.6 |
Team | Nov 2025 | 0.5/1 | #122 | 2233 | -0.9 |
Team | Nov 2025 | 1/1 | #2 | 2966 | +3.2 |
Team | Nov 2025 | 0.5/1 | #85 | 2468 | +1.9 |
Team | Oct 2025 | 1/1 | #16 | 2873 | +2.2 |
Team | Oct 2025 | 1/1 | #51 | 2924 | +2.7 |
Team | Sep 2025 | 1.5/2 | #22 | 2390 | +2.3 |
Rankings
/
Netherlands
#145
out of 4,909 players
Europe
#3,018
in continent
World
#4,505
out of 400,000+
National ranking
Europe & World
Europe
World
Netherlands
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| ... | ||
| 145 | 2,287 | |
Europe
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| 5 | 🇵🇱Follow Jan-Krzysztof DudaTrack their monthly FIDE ratings, games, tournaments and more. | 2,739 |
| 6 | 🇭🇺Follow Richard RapportTrack their monthly FIDE ratings, games, tournaments and more. | 2,729 |
| 7 | 🇳🇱Follow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more. | 2,728 |
| 8 | 🇫🇷Follow Maxime Vachier-LagraveTrack their monthly FIDE ratings, games, tournaments and more. | 2,721 |
| 9 | 🇦🇿Follow Shakhriyar MamedyarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,717 |
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| ... | ||
| 3018 | 2,287 | |
World
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| 6 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
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| 8 | 🇮🇳Follow Erigaisi ArjunTrack their monthly FIDE ratings, games, tournaments and more. | 2,761 |
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| ... | ||
| 4505 | 2,287 | |